Oil filter



FIG. 1 is a front perspective view from above of the claimed oil filter;

FIG. 2 is a front perspective view from below of the claimed design of FIG. 1;

FIG. 3 is a front view of the claimed design of FIG. 1;

FIG. 4 is a rear view of the claimed design of FIG. 1;

FIG. 5 is a left side view of the claimed design of FIG. 1;

FIG. 6 is a right side view of the claimed design of FIG. 1;

FIG. 7 is a top view of the claimed design of FIG. 1; and,

FIG. 8 is a bottom view of the claimed design of FIG. 1.

Any portion of the article depicted in broken lines forms no part of the claimed design. 

CLAIM We claim the ornamental design for an oil filter, as shown and described. 